Speaker
Dr
Fabrizio Tavecchio
(INAF)
Description
I discuss the concept and the consequences of the so-called "blazar sequence", connecting the position of the peaks in the spectral energy distribution of blazars with the emitted luminosity. I also present a recent revision of the theoretical basis of the blazar sequence, which, contrary to the simplest interpretation, predicts a large population of low-power "red" blazars and possibly the existence of powerful "blue" quasar, whose high-energy spectral component extends to the multi-GeV energy band. A better characterization of the blazar sequence will be possible in the next years thanks to the large number of sources expected to be detected by the Fermi Gamma-ray
Space Telescope and by the new generation of Cherenkov telescopes.
Author
Dr
Fabrizio Tavecchio
(INAF)
